AXON Hearing Aid-137
Model: F-137 BTE Hearing Aid
Max Sound Output: 127dB ± 4dB
Max Sound Gain: 48dB ± 5dB
Total Harmonic Distortion: ≤4%
Frequency Range: 450~3500 Hz
Equiv Input Noise: ≤30 dB
Battery: AG5 Button Battery or A13 (Zinc-Air Battery)
Working Voltage D. C. 1.5V
Working Current: ≤3 mA